Analysis of Air Transportation Systems Fundamentals of Aircraft ...

Observe Some Trends from Takeoff Curves• If DTW increases the RL values increase non-linearly (explainusing the fundamental aircraft acceleration equation)• As field elevation increases (pressure altitude) the RL valuesincrease as well (temperature effect on air density)• As DTW and field elevation increase the optimum flap setting fortakeoff decreases- This is consistent with our knowledge of C d and C L . Hot and highairfield elevations require very low flap settings during takeoff toreduce the drag of the aircraft.• High airfield elevations (and large to moderate DTWs) could hit atire speed limit boundary. Aircraft tires are certified to this limitand thus an airline would never dare to depart beyond this physicalboundary.Virginia Tech - Air Transportation Systems Laboratory 103